Witcher 3 Microstuttering och konstig bild, vad kan det vara?

Vet inte vilken FPS du får men prova slå på v-sync?

The in-game framerate limiter has been found to cause frame pacing issues (i.e. stuttering) and a lot of players now agree that the best way to combat these is to disable both the game's internal framerate limiter and VSync, then set it to run in fullscreen and use NVIDIA's Adaptive VSync solution instead!
First of all, go to the in-game graphics options menu and configure the following settings as shown below:
VSync: Off
Maximum Frames Per Second: Unlimited
Display Mode: Full Screen
Then open NVIDIA Control Panel, click on the "Manage 3D settings" tab on the left-hand side of the window, select "Program Settings", find "The Witcher 3 (witcher3.exe)" in the drop-down menu and edit the following variables as shown below:
Triple buffering: On
Vertical sync: Adaptive or Adaptive (half refresh rate)
NOTE: The "Adaptive" setting will synchronise and cap your framerate to your monitor's set refresh rate (e.g. 60 FPS cap on 60 Hz monitors), while "Adaptive (half refresh rate)" will do the same at half of your monitor's refresh rate (i.e. 30 FPS cap on 60 Hz monitors, 60 FPS cap on 120 Hz monitors and 72 FPS cap on 144 Hz monitors)!
By applying this all-inclusive tweak you will no longer suffer from screen tearing, nor the input lag associated with traditional VSync, and your game will be capped at a fixed framerate of your choosing, which will keep both jarring framerate fluctuations and your GPU temperatures in check!